Bacterial Footprints in Elastic Pillared Microstructures

Susarrey Arce, Arturo, Hernández-Sánchez, José Federico, Marcello, Marco ORCID: 0000-0002-2392-8640, Diaz Fernandez, YA ORCID: 0000-0003-3422-8663, Oknianska, Alina, Sorzabal Bellido, Ioritz ORCID: 0000-0001-8050-1443, Tiggelaar, Roald, Lohse, Detlef, Gardeniers, Han, Snoeijer, Jacco
et al (show 2 more authors) (2018) Bacterial Footprints in Elastic Pillared Microstructures. ACS Appl. Bio Mater..

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Soft substrates decorated with micropillar arrays are known to be sensitive to deflection due to capillary action. In this work, we demonstrate that micropillared epoxy surfaces are sensitive to single drops of bacterial suspensions. The micropillars can show significant deformations upon evaporation, just as capillary action does in soft substrates. The phenomenon has been studied with five bacterial strains: S. epidermidis, L. sakei, P. aeruginosa, E. coli, and B. subtilis. The results reveal that only droplets containing motile microbes with flagella stimulate micropillar bending, which leads to significant distortions and pillar aggregations forming dimers, trimers, and higher order clusters. Such deformation is manifested in characteristic patterns that are left on the microarrayed surface following evaporation and can be easily identified even by the naked eye. Our findings could lay the ground for the design and fabrication of mechanically responsive substrates, sensitive to specific types of microorganisms.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 14 Mar 2019 08:44
Last Modified: 14 Apr 2022 15:16
DOI: 10.1021/acsabm.8b00176